Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.2' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 26.749692] kasan: CONFIG_KASAN_INLINE enabled [ 26.760855] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 26.769521] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 26.775753] Modules linked in: [ 26.778938] CPU: 1 PID: 8076 Comm: syz-executor297 Not tainted 4.14.300-syzkaller #0 [ 26.786809] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 26.796574] task: ffff8880b3af0240 task.stack: ffff8880b32b8000 [ 26.802629] RIP: 0010:pppol2tp_session_init+0x1ca/0x4d0 [ 26.807979] RSP: 0018:ffff8880b32bfc50 EFLAGS: 00010202 [ 26.813336] RAX: dffffc0000000000 RBX: ffff8880af2c6940 RCX: 1ffffffff11995ad [ 26.820600] RDX: 0000000000000045 RSI: ffffffff87cd1180 RDI: 0000000000000228 [ 26.827866] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000020011 [ 26.835131] R10: ffff8880b3af0af0 R11: ffff8880b3af0240 R12: 0000000000001f8c [ 26.842397] R13: 0000000000000002 R14: ffff8880b36d6352 R15: ffff8880b36d6370 [ 26.849660] FS: 0000555555a49300(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 [ 26.857883] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 26.863767] CR2: 00007fffcdf7eaf8 CR3: 00000000a1f50000 CR4: 00000000003406e0 [ 26.871046] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 26.878316] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 26.885587] Call Trace: [ 26.888173] pppol2tp_connect+0xd5c/0x13d0 [ 26.892410] ? pppol2tp_recv_payload_hook+0x1a0/0x1a0 [ 26.897602] ? lock_acquire+0x170/0x3f0 [ 26.901572] ? lock_downgrade+0x740/0x740 [ 26.905723] ? security_socket_connect+0x83/0xb0 [ 26.910473] ? pppol2tp_recv_payload_hook+0x1a0/0x1a0 [ 26.915656] SyS_connect+0x1f4/0x240 [ 26.919360] ? SyS_accept+0x30/0x30 [ 26.922980] ? up_read+0x17/0x30 [ 26.926341] ? __do_page_fault+0x159/0xad0 [ 26.930567] ? do_syscall_64+0x4c/0x640 [ 26.934532] ? SyS_accept+0x30/0x30 [ 26.938150] do_syscall_64+0x1d5/0x640 [ 26.942039] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 26.947220] Code: fa 80 3d 65 9d 6c 03 00 0f 84 25 02 00 00 e8 1e 94 ce fa 48 8d bd 28 02 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 db 02 00 00 48 8b ad 28 02 00 00 e8 c0 6d bf [ 26.966360] RIP: pppol2tp_session_init+0x1ca/0x4d0 RSP: ffff8880b32bfc50 [ 26.974588] ---[ end trace 089cdc02cc03dffe ]--- [ 26.979414] Kernel panic - not syncing: Fatal exception [ 26.984948] Kernel Offset: disabled [ 26.988564] Rebooting in 86400 seconds..